Efficient desulfurization equipment and desulfurization method for copper smelting flue gas

Abstract

The invention provides efficient desulfurization equipment and desulfurization method for copper smelting flue gas. The efficient desulfurization equipment comprises a desulfurization tower, an exhaust fan is arranged in the desulfurization tower, a furnace body cabin is arranged at the top of the desulfurization tower, one end of the top of the furnace body cabin is communicated with an alkali desulfurization cabin, and an alkalization assembly is oppositely arranged at the gas outlet end of the alkali desulfurization cabin; the liquid outlet end of the alkalization assembly is in a spraying type, and the spraying direction is opposite to the gas flow guide direction of the alkali desulfurization cabin; the alkalization assembly is communicated with an impurity removal cooling cabin, the impurity removal cooling cabin is located on the outer peripheral side of the alkali desulfurization cabin, a cooling liquid box is arranged at the end, close to the furnace body cabin, of the impurity removal cooling cabin, the top of the cooling liquid box is communicated with an oxidation box body, gas flowing out of the cooling liquid box flows to the oxidation box body in a one-way mode, and the upper portion of the oxidation box body is connected with a dust removal cabin; according to the flue gas desulfurization device, the flue gas is guided by the pipeline type equipment to realize the twice desulfurization effect in a variable-speed and variable-temperature manner, so that the one-time full-impurity desulfurization effect can be realized, the more optimized flue gas emission purification degree is obtained, and the environmental pollution is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas desulfurization treatment equipment, and in particular to a high-efficiency desulfurization equipment and a desulfurization method for copper smelting flue gas. Background Art

[0002] When treating flue gas, bag dust collectors are usually used to filter the flue gas. However, since bag dust collectors can only remove dust particles, they cannot effectively remove some harmful waste gases such as sulfides in the flue gas. In order to ensure that the flue gas emissions meet the standards, factories usually apply alkaline solution spraying devices to the pipelines through which the sulfur-containing flue gas passes to react chemically with sulfur to reduce the sulfur content of the flue gas. However, the direct spraying method of water droplets and water mist of the alkaline solution will leave a large amount of space gap between the flow method of the flue gas, resulting in a large amount of sulfur-containing flue gas escaping. The use of extra-long pipelines and a large amount of alkaline solution spraying will result in a large amount of solution cost waste, and there will still be a large amount of sulfur-containing flue gas escaping due to uneven spraying, and the complete flue gas emission purification and filtration effect cannot be achieved, and the applicability is poor.

[0003] To achieve the above objectives, the present invention provides a high-efficiency desulfurization device and a desulfurization method for copper smelting flue gas, which can solve the problems raised in the above background technology. Summary of the invention

[0004] The present invention adopts the following technical solutions to achieve:

[0005] A high-efficiency desulfurization device for copper smelting flue gas, comprising a desulfurization tower, an exhaust fan is arranged inside the desulfurization tower, a furnace cabin is arranged on the top of the desulfurization tower, one end of the top of the furnace cabin is connected to an alkali desulfurization cabin, an alkalization component is arranged opposite to the gas outlet end of the alkali desulfurization cabin, and the liquid outlet end of the alkalization component is a spray type and the spraying direction is opposite to the gas guide direction of the alkali desulfurization cabin;

[0006] The alkalization component is connected to an impurity removal cooling cabin, and the impurity removal cooling cabin is located on the outer peripheral side of the alkali desulfurization cabin. The impurity removal cooling cabin is provided with a coolant tank near one end of the furnace cabin, and the top of the coolant tank is connected to an oxidation box. The gas flowing out of the coolant tank flows in a unidirectional manner to the oxidation box, and the upper part of the oxidation box is connected to a dust removal cabin.

[0007] Preferably, the furnace body cabin is a truncated cone-shaped cabin, the truncated cone bottom end of the furnace body cabin is connected to the exhaust fan, the truncated cone top end of the furnace body cabin is connected to the alkali desulfurization cabin, and the cross-sectional area of ​​the air inlet end of the alkali desulfurization cabin is smaller than the air inlet area of ​​the truncated cone bottom end of the furnace body cabin.

[0008] Preferably, the alkaline desulfurization chamber includes a plurality of desulfurization pipes, and the air inlet ends of the plurality of desulfurization pipes are connected to the furnace chamber;

[0009] The alkalization component is fixed inside the dust removal chamber, and the alkalization component includes an alkalization water tank. The outside of the alkalization water tank is connected to a circulating clean water tank through a pump body. A plurality of spray devices are provided at the bottom of the alkalization water tank. The plurality of spray devices correspond one-to-one to the central axis of the desulfurization pipe, and the gas flow direction inside the desulfurization pipe is opposite to the spray direction of the spray device.

[0010] Preferably, the desulfurization tube includes an inner tube and an outer tube with one end connected to each other, one end of the inner tube is fixed to the furnace chamber, and the other end is connected to the inside of the outer tube, and one end of the outer tube is fixed to the impurity removal cooling chamber;

[0011] The sleeve gap between the inner tube and the outer tube is connected to the bottom end of the impurity removal cooling chamber and is used for guiding the wall-hanging alkali solution.

[0012] Preferably, a ventilation cover is provided outside the alkalization component;

[0013] The impurity removal cooling cabin includes a cooling pipe and a coolant tank, the cooling pipe includes two side ring frames, the side ring frames are sleeved and fixed to the outside of the alkali desulfurization cabin, the side ring frame on one side is sealed and fixed to the edge source of the ventilation hood, and the side ring frame on the other side is fixed to the coolant tank, and a plurality of secondary acceleration tubes are arranged on the two side ring frames, and the two ends of the secondary acceleration tubes are connected to the ventilation hood and the top of the coolant tank;

[0014] The total air inlet area of ​​the plurality of secondary accelerating tubes is smaller than the air inlet area of ​​the ventilation hood.

[0015] Preferably, the coolant tank is sleeved and fixed on the outside of the alkali desulfurization chamber, and an air suction groove is provided inside the dust removal chamber, and a fan is provided inside the air suction groove;

[0016] The inner space of the cooling tube and the inner space of the secondary accelerating tube are sealed with each other, the air suction groove is communicated with the inner space of the cooling tube, and the air suction groove is communicated with the outside of the desulfurization equipment.

[0017] Preferably, the oxidation desulfurization chamber includes an air pump and an oxidation box, the oxidation box is sleeved and fixed on the outside of the cooling pipe, the air inlet end of the air pump is connected to the top of the coolant tank, the air pump and one end of the gas inlet of the oxidation box are connected with a one-way airflow valve, and the oxidation box is filled with hydrogen peroxide.

[0018] Preferably, the dust removal chamber comprises a drying box body fixed to the top of the oxidation desulfurization chamber, and a filter layer is provided inside the drying box body.

[0019] Preferably, the top of the dust removal chamber is connected to a main driving fan.

[0020] A highly efficient desulfurization method for copper smelting flue gas comprises the following steps: S1, injecting desulfurization raw materials: turning on the desulfurization equipment liquid supply pump at the top of the desulfurization tower, detecting the connected circulation state of the coolant in the impurity removal cooling chamber and the oxidizing liquid in the oxidizing desulfurization chamber, and determining the normalized constant liquid level height;

[0021] S2. Equipment dust removal: Use a dust collector to remove dust from inside the tower;

[0022] S3, desulfurization: Turn on the liquid supply pump connected to the feed end of the alkalization component to spray the alkaline water raw material with a pH of 6.8 to 8.5 into the alkali desulfurization chamber, and simultaneously turn on the exhaust fan inside the desulfurization furnace body to introduce the flue gas into the alkali desulfurization chamber;

[0023] S4, impurity removal: connecting the external circulating water pump of the impurity removal cooling cabin, alternately circulating oxidation water and clean water, and synchronously starting the main driving fan;

[0024] S5. Flue gas detection: Conduct flue gas sulfidation detection on the top of the desulfurization tower, and simultaneously conduct flue gas sulfidation detection on the external cooling connection port on the side of the desulfurization tower.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention guides the flue gas to change speed, temperature and adhesion through pipeline equipment to achieve desulfurization, impurity removal and two-time filtration effects, which can achieve a one-time full impurity desulfurization effect, obtain a more optimized flue gas emission effect, and reduce environmental pollution; first, the sulfur-containing flue gas is desulfurized and neutralized by alkaline. The device uses a corresponding multi-port reverse spraying method, and collects the alkaline solution after spraying for secondary blending and utilization, which can save costs and also facilitate the increase of the spraying effect. The spraying device corresponds to the desulfurization pipe one by one, which can better form a more complete alkaline solution atomization area at the outlet end of the desulfurization pipe and the entire interior of the ventilation hood, which can enhance the effect of hedge spray desulfurization. At the same time, it can better control the temperature of the flue gas, that is, when the flue gas passes through the ventilation hood, it takes away part of the attached alkaline solution mist and enters the second-stage acceleration tube. The low-temperature zone formed in the second-stage acceleration tube section can facilitate the rapid condensation of the alkaline solution mist and take away the sulfur content in the flue gas. The second-stage acceleration tube will also drive the flue gas and the coolant in the coolant tank to achieve a straight-line collision. After cooling the flue gas, it can also prevent the flue gas from excessively reacting with the solution inside the oxidation desulfurization chamber due to high temperature and causing excessive pressure. While meeting the secondary desulfurization requirements, the overpressure risk of the secondary desulfurization is eliminated by efficient desulfurization and cooling, and all-round filtration of sulfur-containing flue gas is achieved through two desulfurization methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the top structure connection of the desulfurization tower of the present invention;

[0028] Figure 2 It is a schematic diagram of the connection between the external structure of the present invention and the internal structure of the coolant tank;

[0029] Figure 3 The internal structure and end connection schematic diagram of the cooling pipe of the present invention;

[0030] Figure 4 It is a schematic diagram of the connection between the internal structure of the alkali desulfurization cabin and the alkalization component structure of the present invention.

[0031] In the figure: 1. Alkali desulfurization chamber; 2. Impurity removal cooling chamber; 3. Oxidation desulfurization chamber; 4. Dust removal chamber; 5. Main drive fan; 6. Furnace chamber;

[0032] 101, desulfurization pipe; 102, inner pipe; 103, outer pipe; 104, alkalization component; 105, spraying device;

[0033] 106. Ventilation hood;

[0034] 201, cooling pipe; 202, side ring frame; 203, secondary accelerating tube; 204, coolant tank; 205, air suction slot; 206, air exchanger;

[0035] 301, air pump; 302, one-way air flow valve; 303, oxidation box;

[0036] 401, drying box; 402, filter layer. DETAILED DESCRIPTION

[0037] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0041] In one embodiment of the present invention: Please refer to the attached Figure 1-3 , a high-efficiency desulfurization device for copper smelting flue gas, comprising a desulfurization tower, an exhaust fan is arranged inside the desulfurization tower, a furnace cabin 6 is arranged on the top of the desulfurization tower, one end of the top of the furnace cabin 6 is connected to an alkali desulfurization cabin 1, an alkalization component 104 is arranged oppositely at the gas outlet end of the alkali desulfurization cabin 1, and the liquid outlet end of the alkalization component 104 is a spray type and the spraying direction is opposite to the gas diversion direction of the alkali desulfurization cabin 1;

[0042] The alkalization component 104 is connected to an impurity removal cooling cabin 2, and the impurity removal cooling cabin 2 is located on the outer peripheral side of the alkali desulfurization cabin 1. The impurity removal cooling cabin 2 is provided with a coolant tank 204 at one end close to the furnace cabin 6, and the top of the coolant tank 204 is connected to an oxidation box 303, and the gas flowing out of the coolant tank 204 flows to the oxidation box 303 in a unidirectional manner. The upper part of the oxidation box 303 is connected to a dust removal cabin 4; the present invention guides the flue gas to change speed, change temperature, and adhere in a pipeline-type device to achieve desulfurization, impurity removal, and two filtering effects, which can achieve a one-time full impurity desulfurization effect, obtain a more optimized flue gas emission effect, and reduce environmental pollution; first, the sulfur-containing flue gas is subjected to alkaline desulfurization neutralization, and the device uses a corresponding multi-port reverse spraying method, and collects and re-adjusts the alkaline solution after spraying, which can save costs and also facilitate the increase of the spraying effect. The spraying device 105 and the desulfurization The sulfur tubes 101 correspond one by one, and can better form a more complete alkaline solution atomization zone at the outlet end of the desulfurization tube 101 and the entire interior of the ventilation hood 106, which can improve the effect of hedge spray desulfurization. At the same time, it can better control the temperature of the flue gas, that is, when the flue gas passes through the ventilation hood 106, it takes away part of the attached alkaline solution mist and enters the interior of the secondary acceleration tube 203. The low temperature zone formed in the pipe section of the secondary acceleration tube 203 can facilitate the rapid condensation of the alkaline solution mist and take away the sulfur content in the flue gas. The secondary acceleration tube 203 will also drive the flue gas and the coolant in the coolant tank 204 to achieve a straight line hedge. After cooling the flue gas, it can also prevent the flue gas from excessively reacting with the solution inside the oxidation desulfurization cabin 3 due to high temperature and causing excessive pressure. While meeting the secondary desulfurization, the overpressure risk of the secondary desulfurization is eliminated by efficient desulfurization and cooling, and all-round filtration of sulfur-containing flue gas is achieved through two desulfurization methods.

[0043] In another embodiment of the present invention: Please refer to Figure 2-4 The furnace cabin 6 is a truncated cone-shaped cabin, the truncated cone bottom end of the furnace cabin 6 is connected to the exhaust fan, the truncated cone top end of the furnace cabin 6 is connected to the alkali desulfurization cabin 1, and the air inlet end section area of ​​the alkali desulfurization cabin 1 is smaller than the air inlet area of ​​the truncated cone bottom end of the furnace cabin 6;

[0044] The alkaline desulfurization chamber 1 includes a plurality of desulfurization pipes 101, and the air inlet ends of the plurality of desulfurization pipes 101 are connected to the furnace chamber 6;

[0045] The alkalization component 104 is fixed inside the dust removal cabin 4, and the alkalization component 104 includes an alkaline water tank, and the outside of the alkaline water tank is connected to a circulating clean water tank through a pump body. A plurality of spray devices 105 are provided at the bottom of the alkaline water tank, and the plurality of spray devices 105 correspond to the central axis of the desulfurization pipe 101 one by one. The gas flow direction inside the desulfurization pipe 101 is opposite to the spray direction of the spray device 105. The flue gas counteraction method can reduce and concentrate the mixing area of ​​the flue gas and the alkaline solution, increase a more complete and dense atomization area, and enhance the reaction interception effect of the sulfur-containing flue gas and the alkaline solution;

[0046] The desulfurization pipe 101 includes an inner pipe 102 and an outer pipe 103, one end of which is sleeved with each other. One end of the inner pipe 102 is fixed to the furnace chamber 6, and the other end is sleeved inside the outer pipe 103. One end of the outer pipe 103 is fixed to the impurity removal cooling chamber 2. The sleeve gap between the inner pipe 102 and the outer pipe 103 is connected to the bottom end of the impurity removal cooling chamber 2, which is used to guide the wall-hanging alkali solution.

[0047] This method can facilitate the circulation and replenishment of the alkaline solution at the source of the alkalization component 104 and the mixed solution collected at the coolant tank 204, and can facilitate the secondary utilization of the alkaline solution raw materials, thereby increasing the spraying amount at the spray device 105. The spraying space that the spray device 105 needs to be responsible for is smaller, and there will be no problems such as uneven spraying and incomplete coverage of the fog zone blockade.

[0048] In another embodiment of the present invention: Please refer to Figure 2 , Figure 3 A ventilation cover 106 is provided outside the alkalization component 104;

[0049] The impurity removal cooling chamber 2 includes a cooling pipe 201 and a coolant tank 204. The cooling pipe 201 includes two side ring frames 202. The side ring frames 202 are sleeved and fixed to the outside of the alkali desulfurization chamber 1. The side ring frame 202 on one side is sealed and fixed to the edge of the ventilation hood 106. The side ring frame 202 on the other side is fixed to the coolant tank 204. A plurality of secondary accelerating tubes 203 are arranged on the two side ring frames 202. The two ends of the secondary accelerating tubes 203 are connected to the ventilation hood 106 and the top of the coolant tank 204.

[0050] The total air inlet area of ​​the plurality of secondary accelerating tubes 203 is smaller than the air inlet area of ​​the ventilation cover 106;

[0051] The cooling liquid tank 204 is sleeved and fixed on the outside of the alkali desulfurization chamber 1, and the dust removal chamber 4 is provided with an air suction groove 205 inside, and a fan 206 is provided inside the air suction groove 205;

[0052] The inner space of the cooling tube 201 is sealed with the inner space of the secondary accelerating tube 203, the air suction groove 205 is connected with the inner space of the cooling tube 201, and the air suction groove 205 is connected with the outside of the desulfurization equipment;

[0053] This device uses the Bernoulli principle to block and gather the airflow, accelerates the impact effect of the sulfur-containing flue gas and the spray water mist of the alkalization component 104, and facilitates the formation of a cavity-type mixed water mist inside the ventilation cover 106, thereby increasing the reaction intensity of the primary desulfurization and the reaction frequency of the alkaline solution and the sulfate radical. When the airflow passes through the secondary acceleration tube 203, the flow rate is accelerated again according to the Bernoulli principle, strengthening the narrow tube effect, improving the cooling effect, and facilitating the flue gas to impact and adhere to the liquid surface of the coolant tank 204 after passing through the secondary acceleration tube 203, providing pressure for the exhaust of the flue gas inside the coolant tank 204. At the same time, the initial temperature of the narrow tube, i.e., the secondary acceleration tube 203, can be reduced more quickly in conjunction with the fan 206, so that the secondary acceleration tube 203 can maintain a lower temperature to facilitate the condensation of water vapor and the retention of sulfur-containing flue gas.

[0054] Please pay attention to Figure 2 The oxidation desulfurization cabin 3 includes an air pump 301 and an oxidation box 303. The oxidation box 303 is sleeved and fixed on the outside of the cooling pipe 201. The air inlet end of the air pump 301 is connected to the top of the coolant tank 204. The air pump 301 and one end of the gas inlet of the oxidation box 303 are connected with a one-way airflow valve 302. The oxidation box 303 is filled with hydrogen peroxide. The air pump 301 discharges the flue gas in the coolant tank 204 into the oxidation box 303 for secondary desulfurization. The exhaust method is intermittent exhaust. The one-way airflow valve 302 is used to turn on and off a single impact airflow. This method can produce a tumbling and stirring effect on the inside of the oxidation box 303, which is convenient for obtaining a better desulfurization reaction effect.

[0055] Please pay attention to Figure 1 The dust removal chamber 4 includes a drying box 401 fixed to the top of the oxidation desulfurization chamber 3, a filter layer 402 is arranged inside the drying box 401, and a main driving fan 5 is connected to the top of the dust removal chamber 4; the flue gas is discharged into the desulfurization tower through the fan after being treated by the bag dust collector, and first enters the main tower body through the desulfurization pipe 101. The flue gas can be evenly distributed and ascended in the tower through the flow equalizing plate at the bottom of the tower body, and after being reversely mixed with the mist water mist generated by the spray high-pressure nozzle of the alkalization component 104 over a large area, the harmful waste gas such as sulfide in the flue gas is mixed with the spray water mist (alkaline substances such as NaOH are added to the circulating alkali solution), and most of them are discharged from the tower body through the coolant tank 204 at the bottom of the tower body, and enter the circulating water pool for precipitation and filtration. The purified gas rises with part of the water mist, and after a Z-shaped water blocking plate is set or the drying box 401 is used to block water, it is discharged from the main driving fan 5 position of the exhaust port.

[0056] In another embodiment of the present invention: the device uses a high-efficiency desulfurization method for copper smelting flue gas, comprising the following steps: S1, injecting desulfurization raw materials: turning on the desulfurization equipment liquid supply pump at the top of the desulfurization tower, detecting the connected circulation state of the coolant inside the impurity removal cooling chamber 2 and the oxidizing liquid inside the oxidation desulfurization chamber 3, and determining the normalized constant liquid level height; performing a spot check before operating the equipment to determine that the coolant tank 204 reaches the water level standard: the lowest water level shall not be lower than the water intake port, the highest water level shall not be higher than the water outlet port, testing the circulation effect of the circulating water, and the page height of the coolant tank 204 shall not be greater than the bottom outlet height of the secondary acceleration end;

[0057] S2. Equipment dust removal: Use the dust collector to remove dust inside the tower body. First, start the liquid supply pump of the alkalization component 104. The liquid supply pump is equipped with a frequency converter control. The frequency can be adjusted appropriately to control the amount of water. When liquid flows out from the outlet of the desulfurization tower coolant tank 204, start the dust collector fan. After the dust collector fan motor runs normally, when the fan runs at the set minimum frequency, the alkalization component 104 flushing water pump is automatically started. The running time can be set from 1 to 60 minutes.

[0058] S3, desulfurization: open the liquid supply pump connected to the feed end of the alkalization component 104, spray the alkaline water raw material with a mist and a pH between 6.8 and 8.5 to the alkali desulfurization chamber 1, and simultaneously open the exhaust fan inside the desulfurization furnace body to introduce the flue gas into the alkali desulfurization chamber 1. The feed end of the alkaline solution and the stirring pump are set to stir the alkaline aqueous solution in real time, and the pH of the circulating liquid in the clear water tank is controlled to be 6.8-8.5. When the pH is less than 6.8, open the valve of the sodium alkali dosing pump to add alkali to the inside of the alkalization component 104 to increase the pH value of the circulating water. When the pH is greater than 8.5, close the valve of the sodium alkali dosing pump; connect to set the regeneration tank, and the pH of the filler reaction mixture is 6.8-8; when the pH is less than 6.8, automatically open the lime dosing pump to add lime slurry to the regeneration tank to increase the pH value. When the pH is 8.5, close the lime dosing pump;

[0059] S4, impurity removal: connect the external circulating water pump of the impurity removal cooling cabin 2, alternately circulate the oxidized water and the clean water, and start the main driving fan 5 simultaneously; when the impurity removal process is accelerated and hedged once, the sulfur-containing flue gas passes through the outer tube 103 of the desulfurization tube 101 to the atomization area formed by the alkalization component 104, mixes to form water droplets hanging on the wall, and flows into the coolant tank 204 from the gap between the inner tube 102 and the outer tube 103. In addition, the secondary acceleration tube 203 is used to accelerate the flue gas twice to realize the flue gas and impurities to form a hedge liquid surface attachment to the solution inside the coolant tank 204, thereby taking away the remaining impurities;

[0060] S5. Flue gas detection: Flue gas sulfidation detection is carried out on the top of the desulfurization tower, and flue gas sulfidation detection is carried out on the external cooling connection port on the side of the desulfurization tower at the same time. The flue gas detection is carried out in two ways, one is the end sulfidation flue gas content detection, and the other is the external exhaust sealing leakage flue gas detection. Monitoring is implemented at the suction groove 205. The suction groove 205 is connected to the internal pipeline, and suction will definitely be generated at the suction groove 205, so that untreated flue gas is discharged. The connected flue gas flow intervals of the suction groove 205 are the upper space of the coolant tank 204 and the internal space of the cooling pipe 201, respectively, so it is convenient to conduct leakage self-inspection at these two points.

[0061] In addition, the spray tower is made of 12mm steel plate. To prevent acid corrosion, the inside of the tower should be made of glass flake anti-corrosion layer; or FRP or 316L stainless steel. The spray components in the tower are made of 316L stainless steel or FRP, the nozzles are made of silicon carbide, the demisting system is made of PP material, the circulating water pump is a wear-resistant and corrosion-resistant horizontal pump, and the alkalization component 104 water pump is a clean water pump.

[0062] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A high-efficiency desulfurization device for copper smelting flue gas, characterized by: It comprises a desulfurization tower, wherein an exhaust fan is arranged inside the desulfurization tower, a furnace cabin (6) is arranged on the top of the desulfurization tower, one end of the top of the furnace cabin (6) is connected to an alkali desulfurization cabin (1), an alkalization component (104) arranged opposite to the gas outlet end of the alkali desulfurization cabin (1), and the liquid outlet end of the alkalization component (104) is of spray type and the spraying direction is opposite to the gas guide direction of the alkali desulfurization cabin (1); The alkalization component (104) is connected to an impurity removal cooling chamber (2), and the impurity removal cooling chamber (2) is located on the outer peripheral side of the alkali desulfurization chamber (1). The impurity removal cooling chamber (2) is provided with a coolant tank (204) at one end close to the furnace chamber (6). The top of the coolant tank (204) is connected to an oxidation chamber (303). The gas flowing out of the coolant tank (204) flows in a unidirectional manner to the oxidation chamber (303). The upper part of the oxidation chamber (303) is connected to a dust removal chamber (4).

2. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 1 is characterized in that: The furnace body cabin (6) is a truncated cone-shaped cabin, the truncated cone bottom end of the furnace body cabin (6) is connected to the exhaust fan, the truncated cone top end of the furnace body cabin (6) is connected to the alkali desulfurization cabin (1), and the air inlet end cross-sectional area of ​​the alkali desulfurization cabin (1) is smaller than the air inlet area of ​​the truncated cone bottom end of the furnace body cabin (6).

3. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 1 is characterized in that: The alkaline desulfurization chamber (1) comprises a plurality of desulfurization pipes (101), and the air inlet ends of the plurality of desulfurization pipes (101) are connected to the furnace chamber (6); The alkalization component (104) is fixed inside the dust removal chamber (4), and the alkalization component (104) includes an alkalization water tank. The outside of the alkalization water tank is connected to a circulating clean water tank through a pump body. A plurality of spray devices (105) are provided at the bottom of the alkalization water tank. The plurality of spray devices (105) correspond one-to-one to the central axis of the desulfurization pipe (101), and the gas flow direction inside the desulfurization pipe (101) is opposite to the spray direction of the spray device (105).

4. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 3 is characterized in that: The desulfurization pipe (101) comprises an inner pipe (102) and an outer pipe (103) whose ends are sleeved together, one end of the inner pipe (102) is fixed to the furnace chamber (6), and the other end is sleeved inside the outer pipe (103), and one end of the outer pipe (103) is fixed to the impurity removal cooling chamber (2); The sleeve gap between the inner tube (102) and the outer tube (103) is connected to the bottom end of the impurity removal cooling chamber (2) and is used to guide the wall-hanging alkali solution.

5. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 1 is characterized in that: A ventilation cover (106) is provided outside the alkalization component (104); The impurity removal cooling chamber (2) comprises a cooling pipe (201) and a cooling liquid tank (204), the cooling pipe (201) comprises two side ring frames (202), the side ring frames (202) are sleeved and fixed on the outside of the alkali desulfurization chamber (1), the side ring frame (202) on one side is sealed and fixed to the edge of the ventilation hood (106), and the side ring frame (202) on the other side is fixed to the cooling liquid tank (204), a plurality of secondary accelerating tubes (203) are arranged on the two side ring frames (202), and the two ends of the secondary accelerating tubes (203) are connected to the ventilation hood (106) and the top of the cooling liquid tank (204); The total air inlet area of ​​the plurality of secondary accelerating tubes (203) is smaller than the air inlet area of ​​the ventilation cover (106).

6. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 5 is characterized in that: The cooling liquid tank (204) is sleeved and fixed on the outside of the alkali desulfurization chamber (1), and the dust removal chamber (4) is provided with an air suction groove (205) inside, and a fan (206) is provided inside the air suction groove (205); The internal space of the cooling tube (201) and the internal space of the secondary accelerating tube (203) are sealed with each other, the air suction groove (205) is connected to the internal space of the cooling tube (201), and the air suction groove (205) is connected to the outside of the desulfurization equipment.

7. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 5 is characterized by: The oxidation desulfurization chamber (3) comprises an air pump (301) and an oxidation box (303). The oxidation box (303) is sleeved and fixed on the outside of the cooling pipe (201). The air inlet end of the air pump (301) is connected to the top of the coolant tank (204). A one-way air flow valve (302) is connected between the air pump (301) and one end of the gas inlet of the oxidation box (303). The oxidation box (303) is filled with hydrogen peroxide.

8. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 1 is characterized by: The dust removal chamber (4) comprises a drying box (401) fixed to the top of the oxidation desulfurization chamber (3), and a filter layer (402) is provided inside the drying box (401).

9. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 1, characterized in that: The top end of the dust removal chamber (4) is connected to a main driving fan (5).

10. A method for efficiently desulfurizing copper smelting flue gas, according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1, injecting desulfurization raw materials: turning on the desulfurization equipment liquid supply pump at the top of the desulfurization tower, detecting the connected circulation state of the cooling liquid in the impurity removal cooling chamber (2) and the oxidizing liquid in the oxidizing desulfurization chamber (3), and determining the normalized constant liquid level height; S2. Equipment dust removal: Use a dust collector to remove dust from inside the tower; S3, desulfurization: start the liquid supply pump connected to the feed end of the alkalization component (104), spray the alkaline water raw material with a pH of 6.8 to 8.5 into the alkali desulfurization chamber (1), and simultaneously start the exhaust fan inside the desulfurization furnace body to introduce the flue gas into the alkali desulfurization chamber (1); S4, impurity removal: connecting the external circulating water pump of the impurity removal cooling chamber (2), alternately circulating the oxidized water and the clean water, and synchronously starting the main driving fan (5); S5. Flue gas detection: Conduct flue gas sulfidation detection on the top of the desulfurization tower, and simultaneously conduct flue gas sulfidation detection on the external cooling connection port on the side of the desulfurization tower.

Images